Definition of "sheatfish"

The wels catfish (Silurus glanis), a catfish, the largest freshwater fish in Europe.  examples

Other catfish of genus Silurus.  examples

Any of the species in family Siluridae, including:

1. Wallago species, found in the Danube and other Eastern European rivers.  examples

2. Micromeria (syn. Micronema) spp.  examples

3. Phalacronotus species.  examples